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We spent quite a long time explaining the difference between ABP and OTAA activation modes.
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Now it's time for a quick summary.
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In this table we have the two activation modes and in the different rows we have the topic that has
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been addressed.
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So first about security.
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We saw that both activation mode are secured, but there is a little advantage using OTAA.
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That's because the session keys are regenerated each time the end device will join the network.
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The second point is the management of the frame counter.
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Managing the frame counter in ABP is a little bit more difficult.
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ABP requires to save the frame counter value in a non volatile memory.
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Otherwise, if the end device reset, the network server would take the replay attack and all frames
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would be discarded. In OTAA,
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It's more simple because the frame counter is automatically reset to zero after each join procedure.
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Then the two activation mode are also different in the way they manage the LoRaWAN parameters.
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We gave the example of two parameters RX delay and the frequency plan.
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In ABP, we had to settle everything in the original firmware or we had to use MAC commands for each
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end-devices configuration that was time consuming and eventually that was not that easy.
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In OTAA, everything was settled during the join procedure, so we had nothing to do.
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Regarding the challenge of network operator,
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you can do it with both activation modes, but with ABP you will not be able to use roaming anymore.
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Roaming in LoRaWAN will be used a lot in the coming years, so you should probably consider these features
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with attention.
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So as you have guessed, even if ABP seems to be easier to set up, OTAA has definitely so many advantages,
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OTAA can be used with a Join Server which increase again the interoperability and the overall security
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of the network.
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As a conclusion, always use OTAA unless you have very good reason to use ABP.